Island



(No Model.)

G. D. ROGERS.

GRATE BAR.

Patented June 22,1886.

a, IEHE- r'lEulll FIEIIEIQ INVENTDRI.

UNITED STATES PATENT OFFICE.

CHARLES D. ROGERS, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO GEORGE I'I.CLARKE, OF BROOKLYN, N E\V YORK.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 344,203, dated June22,1886.

Application filed April 9. 1886. Serial No. 198,355.

To all whom it may concern.-

Be it known that 1, CHARLES D. RoeEns, a citizen of the United States,residing at Providence, in the count-y of Providence and State of RhodeIsland, have invented certain new and useful Improvementsin Grate-Bars;and

I do hereby declare the following to be a full,

clear, and exact description of the. invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

The invention illustrated herewith, and hereinafter claimed, relatesespecially to grate bars; and it consists, essentially, in the novelconstruction and arrangement of the longitudinal ribs and the shortlateral bars constituting the grate-bar, by means of which an air-spaceis produced between the outer side of the longitudinal rib and the endof each lateral bar, all as will be more fully hereinafter set forth.

The object of my invention is to so construct grate-bars that the actionof the heat thereon in use will be less destructive than in gratebars asheretofore constructed.

By means of my invention the grate-bars will be more serviceable, and atthe same time permit the air to flow through them in a more uniformmanner.

In order to fully describe and point out the peculiarities of myinvention, I have prepared the accompanying sheet of drawings, in whichFigure 1 represents a plan View of a gratebar provided withmyimprovements. Fig. 2 is a side view of the same, a portion of theouter tie being broken away. Fig. 3 is a transverse sectional view. Fig.4 is a partial plan view of the grate, having the outer or edge tieremoved. Fig. 5 is a cross-sectional View. Fig. 6 is a partial side viewof the same. Figs. 7, S, 9, and 10 are partial plan views showingvarious forms of openings or air-spaces as combined in my improvedgratebar. Fig. 11 is a partial plan view of the grate as provided with asingle longitudinal center tie and lateral bars whose ends are united byside ties. Fig. 12 is a cross-sectional view of the same. Fig. 13 is aplan (No model.)

view of a single tie-bar with the side ties re moved. Fig. 14 is across-sectional view. Fig. 15 is a partial plan view of a clrcular gratemade in sections and embodying my improvements, and Fig. 16 represents acrosssectional view of three grate-bars as usually constructed and set.

The following is a detailed description of my invention, including themanner of its construction and operation. I

A, again referring to the drawings, designates a cast-metal grate-barembodying my improvements'a a being the longitudinal or supporting ribsuniting the lateral bars (I on their under side, as clearly shown inFig. 3. It will be observed that the upper edge, 0, of said ribs aextends but slightly above thelower side of the crossbars, by means ofwhich I not only increase the air-space 0, but also am enabled to reducethe weight of the bars A. Another advantage of this construction is thatby so lowering the tops of the ribs to below the face of the grate theribs are less subject to the action of the fire burning upon saidgrates, thereby increasing the life of the bars.

f indicates a very thin tie, which extends along each side of thegrate-bar, to connect the outer ends of the bars d, as shown. The ribs aare placed with reference to the tiesf so as to form a series of narrowouter air-spaces, c, on each side thereof, opening into or communieatingwith the main air-spaces c, as shown in Figs. 1, 3, 850.

In Figs. 4, 5, and 6 the ties f have been omitted. The openings 0 0,however, are practically retained.

Figs. 11 to 14. indicate a grate-bar constructed substantially as shownin the preceding figures, cxcept that a single longitudinal centralsupporting-rib, a, is employed in lieu of the double ribs beforedescribed.

It is obvious that various shaped bars (I and air-spaces a may beadopted, as shown in Figs. 7, 8, 9, 10, 850., without departing from thespirit of the invention.

In Fig. 15 a portion of a circular grate embodying my improvementsisrepresented. In grates of this class the bars (2 and air-spaces c 0 mayalso be modified in form, substan tially as indicated in said Figs. 7,8, &c.

In Fig. 16 is represented a cross-sectional ICO view of grate-bars asusually made and arranged. In this construction thelongitudinal ribs aof adjacent bars are brought so close together that the air ispractically prevented from circulating freely between them, therebyresulting in the overheating of the ribs, and the consequent warping ofthe grate-bars after a comparatively short use, and necessitatingfrequent renewals of the grate.

By means of the hereinbefore-described improvements I am enabled toproduce a gratebar which, in a very great degree, overcomes thedisadvantages named in the preceding paragraph, as by locating the ribsa farther in from-the ends of the laterals d, I provide a series ofouter air-spaces, c, which communicate with the main air-spaces c, asclearly in *dicated in the several figures. Iwould not be understood,however, as claiming, broadly, a grate-bar having the ends of itslateral bars extending beyond the longitudinal ribs or supporting-ties.

Now, having thus described my invention, what I claim as new, and desireto secure by United States Letters Patent, is-

the grate-bar A, hereinbefore described, consisting of the lateral bars(I, connected at their outer endsby continuous tiesf, and longitudinalribs a a, connecting the under side of said bars (I, the whole arrangedto form a series of central or main air-spaces, c, and connecting sidespaces, a, as set forth.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CHARLES 1). ROGERS.

lVitnesses:

Gno. H. REMINGTON, IVM. R. DUTEMPLn.

